Equations

Question 1

Weight

Answer 1

Mass x gravitational field strength

Question 2

Work done

Answer 2

Force x distance

Question 3

Force (spring)

Answer 3

Spring constant x extension

Question 4

Moment(Nm)

Answer 4

Force x distance

Question 5

Pressure(Pa)

Answer 5

Force/area

Question 6

Speed

Answer 6

Distance/time

Question 7

Accelerations

Answer 7

Change in velocity/time

Question 8

Force

Answer 8

Mass x acceleration

Question 9

Momentum

Answer 9

Mass x velocity

Question 10

Kinetic energy

Answer 10

0.5 x mass x velocity^2

Question 11

GPE

Answer 11

Mass x gravitational field strength x height

Question 12

Power (energy)

Answer 12

(Energy transferred/time) x 100 to get percentage

Question 13

Power (work done)

Answer 13

Work done/time

Question 14

Efficiency

Answer 14

Useful energy output/total input energy

Question 15

Wave speed(m/s)

Answer 15

Frequency(Hz) x Wavelength(m)

Question 16

Density (kg/m^3)

Answer 16

Mass/volume

Question 17

Pressure (in liquid) (Pa)

Answer 17

Height x gravitational field strength x mass

Question 18

Acceleration (equation including distance)

Answer 18

(Final velocity)^2 - (Initial velocity)^2 = 2 x distance x accleration

Question 19

Force (includes time)

Answer 19

Change in momentum / time

Question 20

Elastic potential energy (j)

Answer 20

0.5 x spring constant x (extension)^2

Question 21

Specific heat capacity (j/kg °C)

Answer 21

Change in thermal energy = mass x specific heat capacity x temperature change

Question 22

Period

Answer 22

1/frequency

Question 23

Magnification

Answer 23

Image height / Real height

Question 24

Specific latent heat (j/kg)

Answer 24

Energy = mass x specific latent heat

Question 25

Gases (with a constant)

Answer 25

Pressure x volume = constant